Arrange the following types of coal and their precursor in order of formation from lower burial depths and temperatures to higher.

1. Bituminous
2. Peat
3. Anthracite
4. Lignite
5. Sub-bituminous Coal precursor:

a. Highest burial depths and lowest temperature:
b. Slightly deeper burial depth and higher temperature:
c. Even deeper burial depth and higher temperature:
d. Deepest burial depth and highest temperature:

peat, lignite, sub-bituminous, bituminous, anthracite

Explanation:

1. Peat -  a. Highest burial depths and lowest temperature less than 0.2km and 0 - 25°C,

2. Lignite - b. Slightly deeper burial depth and higher temperature 0.2–1.5 km and 25 – 40°C,

3. Sub-bituminous Coal precursor- c. Even deeper burial depth and higher temperature 1.5 – 2.5 km and 45 - 75°C,

4. Bituminous - Even deeper burial depth and higher temperature 2.5 – 6 km and 75 - 180°C,

5. Anthracite- d. Deepest burial depth and highest temperature, greater than 6 km, and greater than 180 degrees Celsius

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